The invention provides an anthracene-based organic dye and a preparation method thereof. The organic dye provided by the invention has a structure of formula (I) or formula (II), wherein R.sub.a, R.sub.b, and R.sub.2-1 to R.sub.2-4 are as defined herein. The organic dye provided by the invention is obtained by modifying an anthracene with R.sub.a and R.sub.b or modifying anthracene-based groups decorated with an aryl group or a heteroaryl group with R.sub.a and R.sub.b, thereby the power conversion efficiency of a dye sensitized solar cell is significantly improved when the organic dye prepared according to the present invention is applied in a dye-sensitized solar cell. Furthermore, the preparation method of the organic dye according to the present invention is quite simple together with abundant raw materials and low cost, making it possible to be commercialized.

An electro-polarizable compound has the following general formula:

##STR00001## Core1 is an aromatic polycyclic conjugated molecule having a structural formula:

##STR00002##

Core1 is of two-dimensional flat form and self-assembling by pi-pi stacking in a column-like supramolecule. R1 and R1 are, electron donor and acceptor groups, respectively, m and m are the numbers of donor and acceptor groups, respectively and are equal to 0, 1, 2, 3, 4, 5 or 6 but are not both equal to 0. R2 is a substituent comprising one or more ionic groups from a class of ionic compounds that form ionic liquids connected to Core1, p is a number of ionic groups R2 which is equal to 0, 1, 2, 3 or 4. The fragment marked NLE has a nonlinear effect of polarization. Core2 is an electro-conductive oligomer and n is a number of the electro-conductive oligomers equal to 0, 2, or 4. R3 is a substituent comprising one or more ionic groups from a class of ionic compounds that form ionic liquids connected to Core2, s is a number of the ionic groups R3 which is equal to 0, 1, 2, 3 or 4. R4 is a non-conjugate cyclic or polycyclic resistive substituent providing solubility of the organic compound in a solvent and electrically insulating the column-like supramolecules from each other and connected to Core1 and/or to Core2, k is a number of substituents R4 which is equal to 1, 2, 3, 4, 5, 6, 7 or 8

The present invention relates generally to novel rhodamine dyes which upon conjugation with another molecule form single isomeric conjugation products. These novel rhodamine dyes contain only one single functional group on the rhodomine molecule for conjugation so that their conjugation products are single isomeric conjugation products.

The present invention relates generally to novel rhodamine dyes which upon conjugation with another molecule form single isomeric conjugation products. These novel rhodamine dyes contain only one single functional group on the rhodomine molecule for conjugation so that their conjugation products are single isomeric conjugation products.

Provided is a photoelectric conversion element including: a first electrode that includes a photosensitive layer containing a light absorbing agent on a conductive support; and a second electrode that is opposite to the first electrode. The light absorbing agent includes a compound having a perovskite-type crystal structure that includes a cation of an element of Group 1 in the periodic table or a cationic organic group A, a cation of a metal atom M other than the element of Group 1 in the periodic table, and an anion of an anionic atom or atomic group X. A hole transport layer, which includes a hole transporting material, is provided between the first electrode and the second electrode. The hole transporting material includes a compound represented by any one of the following Formulae (1) to (4).

##STR00001##

Provided is a photoelectric conversion element including: a first electrode that includes a photosensitive layer containing a light absorbing agent on a conductive support; and a second electrode that is opposite to the first electrode. The light absorbing agent includes a compound having a perovskite-type crystal structure that includes a cation of an element of Group 1 in the periodic table or a cationic organic group A, a cation of a metal atom M other than the element of Group 1 in the periodic table, and an anion of an anionic atom or atomic group X. A hole transport layer, which includes a hole transporting material, is provided between the first electrode and the second electrode. The hole transporting material includes a compound represented by any one of the following Formulae (1) to (4).

##STR00001##

The present invention relates generally to novel rhodamine dyes which upon conjugation with another molecule form single isomeric conjugation products. These novel rhodamine dyes contain only one single functional group on the rhodomine molecule for conjugation so that their conjugation products are single isomeric conjugation products.

The present invention relates generally to novel rhodamine dyes which upon conjugation with another molecule form single isomeric conjugation products. These novel rhodamine dyes contain only one single functional group on the rhodomine molecule for conjugation so that their conjugation products are single isomeric conjugation products.

The invention concerns heterocyclic compounds and electronic devices, in particular organic electroluminescent devices, containing these compounds.

The invention concerns heterocyclic compounds and electronic devices, in particular organic electroluminescent devices, containing these compounds.